Improvement in rotary blowers



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ROBERT W. rnossnn Ann' WILLIAM RAY, or BROOKLYN, NEW YORK.Y

IMPROVEMENT IN ROTARY BLOWERS.

Speciication forming part of Letters Patent No. 150,7SS, dated May l?, 1874; application lilcd March 2, 1874.

. and Blower, of which the following is a speciiication:

Our invention relates to that class of rotary 4blowing and exhausting engines in which a rotary cylinder carrying radially-slidin g blades is arranged eccentrically Within an exterior stationary cylinder, havingblocks pivoted to the ends ofthe blades, which move in grooves concentric with the external cylinder; and it consists in arms or extensions on the inner edges of the radial blades,which pass through holes in the shaft of the inner cylinder, said arms being 'arranged at dierent positions on them, respectively, so as not to interfere in passing the center, their purpose being to guide the blades in their movement 5 and it further consists in so constructing the blocks, which are pivoted to and guide the outer edges of the blades, that said blocks may be adjusted to compensate for thewear of their edges, and also the wear of the outer edges of the blades.

Figure 1 of the accompanying drawings is a transverse view of the apparatus, the. exterior cylinder and the shaft of the internal cylinder being shown in section, While the internal cylinder, with its radial blades, appears in elevation, having the adjustable guide-blocks removed from the ends of the blades nearest the observer. Fig. 2 is a view of one of the adjustable blocks shown in section, with one of the blades attached, which appears in elevation. Fig. 3 is a longitudinal section on line .r m of Fig. 1.

with three longitudinal radial slots, g, in which three flat blades, 71. h, are free to slide in and out, and upon the outer ends of these bladesI the adjustable guide-blocks 'l t are pivoted,

.vation and two in section.

shown. The inner edges of therblades are provided with two projecting arms, j j, which pass through the center of the interior cylinder, and guide the blades in their radial motion, and these arms are formed at differentdistanccs apart on the several blades to allow of their pass` ing the same center without striking' each other, as shown in Fig. 2, where two are seen in ele- These arms areof a length equal to or greater than the radius of the interna-l cylinder, and, being of such a length, they act at a mechanical advantage toeffectually resist theV lateral strain brought upon the blades by the pressure of the gas, thus maintaining them always in a true position, and guiding them therein throughout the whole extent of their radial movement; and as three blades are employed, equidistant and pointing in divergent directions, which number is necessary for the proper operation of the apparatus, it is impossible that they should ever collide with each other, and the blade and arms can be made much longer than would be possible were a less number than three blades used. The outer edges of the blades are cir cular curves struck from the center of the pins s, whichpivot the guide-blocks t' t', as shown. The guide-blocks z' t' are so constructed that they may be adjusted, when required, to co1npensate for their own wear and the wear of the edges of the blades it 7L. The blocks are constructed preferably as shown in Fig. 2.- viz., in two halves, o p, to the lower half of which are secured two studs, q q, and two pins, r r, which pass through corresponding recesses in the upper half p, the pins r r acting as guides. lhe blades hare pivoted to the upper half at s, and the studs are provided with nuts t t, which bear against a shoulder or recess in the upper half o, and, when turned, separate the two halves o p, and thus force out the outer edge of the block and outer edge of the blades h tight against the sides of the external cylinder, and thereby compensate for any wear that takes place. Handholes 7c are formed in the heads of the external cylinder at the groove c, through which access may be had to the interior, to turn the nuts and adjust the blocks when required, as seen in Fi 1. One end of the central shaft Z of the i11- tcrnal cylinder rests in a socket, u, in one end box, on, on the opposite end of the external l cylinder, and upon it is secured a pulley, n fn,

by which motion may he communicated to the machine, as shown in Fig. 3.

The action of the machine is as follows: When motion is communicated to the shaft of the internal cylinder, it carries with it the'cylinder and its blades. The blocks on the ends of the blades, being compelled to move in the circular grooves e in the cylindenhead, pull out the blades asthey rotate, and keep their circular edges in contact with the internal surface of the large cylinder; consequently the l quantity of air or gas included between any two blades and the surfaces of the internal and external, cylinders is discharged as the intern al cylinder rotates.

Ve have shown the internalcylinder as 'be ing solid, with slots and holes for the passage of the blades, While the central shaft projects from each end 5 but the cylinder may be formed hollow, with radial ribs for strength7 and the shaft passing through it, and having the arms on the blades passing through holes made in the shaft to receive them.

Ve claim as our invention- 1. In combination with the cylinders t f, the three blades h h h, arranged radially with the axis of the cylinder j', and provided each with guiding arms or extensions j j, equal in length to the radius of the cylinder, substantially as and for the purpose set forth.

2. In combination with the blades h 7L h, cylinders f a, and grooves e c, the blocks i 11, so constructed that they may be adjusted to compensate for the Wear of their edges and the edges of the blades h, substantially as hereinA set forth.

In witness whereof We have hereunto signed our names in the presence of two subscribing Witnesses. f

R. W. PROSSER. f WILLIAM RAY.

Witnesses:

Guns. M. Hrednvs, ARTHUR 0. Fansnu. 

